Telescope to see planets11/19/2022 ![]() TELESCOPE TO SEE PLANETS PLUSThe best known Earth-based observatories include the Gemini and Subaru telescopes on Mauna Kea in Hawai'i, which sit on the mountain along with the twin Keck telescopes and a slew of radio and infrared facilities. The southern hemisphere boasts the observatories of the European Southern Observatory collective, the Atacama Large-Millimeter Array radio telescopes, a collection of visible-light and radio observatories in Australia (including the telescopes at Siding Spring and Narrabri), plus telescopes in South Africa and on Antarctica. Several of these observatories observe more than one band of the EM spectrum. The larger the aperture, the lighter gathering power the telescope has and the clearer the image will be.A sample of telescopes (operating as of February 2013) at wavelengths across the electromagnetic spectrum. Telescope sizes are measured by their aperture, or the diameter of their objective lens or mirror. The next thing to consider is the size of the telescope. Refractor telescopes use lenses to magnify terrestrial objects. If you're interested in looking at earthly objects, then you should purchase a refractor telescope. Reflector telescopes use mirrors to gather light and produce clear images of distant objects. There are a few things you should consider before purchasing a telescope: The first is what you want to use the telescope for.Īre you interested in viewing the planets and stars, or do you want to take closer look at terrestrial objects? If you're interested in astronomy, then you'll want to purchase a reflector telescope. There are a few things to consider when choosing a telescope. How to choosing a telescope right for you? The size of the dish determines how sensitive the telescope is, and the larger the dish, the more powerful the telescope. Radio telescopes come in many different shapes and sizes, but all of them have one thing in common: they use a large dish to collect radio waves. Radio telescopes can be used to study objects that are too far away or too obscured to be seen with other types of telescopes. This means that radio waves can penetrate through dust and gas that would block other types of light. Radio waves are a type of electromagnetic radiation, and they are much longer than the waves of visible light. Radio telescopes are the largest type of telescope, and they are used to study everything from quasars to black holes. Radio telescopesĪ radio telescope is a type of telescope that detects and collects radio waves from space. But for many amateur astronomers, the benefits outweigh the cost. One downside to catadioptric telescopes is that they can be more expensive than other types of telescopes. They also tend to have shorter focal lengths, which means they can capture more light in a shorter amount of time. Catadioptric telescopesĪ catadioptric telescope is a type of telescope that uses both lenses and mirrors to capture light from distant objects and focus it into a single image.Ĭatadioptric telescopes are often more compact than other types of telescopes, making them ideal for travel and astrophotography. They are also relatively inexpensive to produce.Ĭassegrain telescopes were developed in the mid-17th century and are named after French priest Nicolas Conte de Cassini, who published a treatise on them in 1672. The simplicity of their design makes them one of the most popular types of amateur telescopes. Newtonian telescopes are named after Sir Isaac Newton, who invented them in 1668. In a Newtonian telescope, the eyepiece is located on the side of the telescope, while in a Cassegrain telescope, it is located at the end of the telescope tube. The difference between the two is in how the eyepiece is positioned. Both types use a concave mirror to gather light and form an image. There are two types of reflecting telescopes: Newtonian and Cassegrain. Despite their popularity, refracting telescopes have some drawbacks, like chromatic aberration, that limit their performance. Refracting telescopes come in a variety of sizes and designs, from small handheld models to large research-grade instruments. They use a lens to bend and focus light, which makes them ideal for observing objects that emit visible light, like stars. Refracting telescopes are one of the oldest types of telescopes and are still widely used today. Get a closer look: Different types of telescopes and how they work ![]()
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